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C. B. SCHULTZ. CLUTCH Patented Nov. 9, 1897.

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UNITED STATES PATENT OFFICE.

CLARENCE B. SCHULTZ, OF OHARLOTTENBURG, GERMANY.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 593,313, dated November9, 1897. Application filedJ'une 22, 1896. Serial No. 596 ,563. (N0model.)

To aZZ whom it may concern:

Be it known that I, CLARENCE B. SCHULTZ, a citizen of the United States,residing at Charlottenburg, in the Province of Brandenburg and Kingdomof Prussia, Germany, have invented certain new and useful Improvementsin Clutches; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

With some small machines it is essential to have a clutch by which themotion is introduced and interrupted quickly with the least possibleshock and by which the machine stops at a given point after one or morerevolutions. These objects are attained by the mechanism illustrated inthe accompanying drawings.

Figure I shows the clutch uncoupled. Part a revolves by any given powerloosely on shaft h, which is connected with the machinery to be driven.Part I), also turning loosely on shaft h, is carried along by spiralspring f of proper size. Part I) bears the catch 0. When coupling-i. 6.,when catch 0 suddenly meets resistancespring f is strained untilequilibrium is reached. Part I) is the only one which does not touch themachine elastically and is therefore made of so little weight that theunavoidable shock is reduced to a hardly perceptible minimum. Part disfastened to the shaft 12. by key '5. By collar 19 part b is held at theproper distance from d. Latch k by a slight turn of shaft 1, Figs. IIand III, can be raised out of groove q of part cl and be placed backagain. Latch 75 has a wedge-like shape with equal, Fig. III, or withincreasing or step-like pitch, Fig. IV, so that when part cl turns inthe direction of the arrow the latch 70 is pushed into a suitable notchs of bolt e. Bolt e, sliding on the slanting part of latch k, will bedrawn from catch 0 and into part d. As soon as latch is is raised spring9 will push bolt e forward again. When latch his placed in the groove,spring 9 acts like a brake, because the side face of notch s will bepressed by spring 9 against the slanting face of latch is. At uniformspeed the shafts 72. will stop always in the same position without anyshock.

to a minimum, bolt e slides right on the shaft h. By nose 0?. the strokeof bolt 0 is limited. Spring g rests against plate 0, which is fastenedto part d.

I am aware that prior to my invention a clutch has been made in which around bolt located at some distance from the shaft has been operated bya wedge-like device.

What I claim asmy invention is 1. A clutch consisting of two loosemembers having a spiral-spring connection, one of said members being ofmuch less weight than the other member and provided with a catch, a fastmember having a peripheral groove and provided with a collar andcarrying a longitudinally-spring-pressed bolt having a notch therein,and a latch having a wedge-shaped nose riding in said groove and adaptedto be engaged by said bolt, said bolt engaging said catch and moving onthe slanting portion of said latch and on the shaft to which said fastmember is connected.

2. A clutch consisting of the loose member a, the loose member I) ofless weight than said member a, and provided with the catch a, thecoiled spring f connecting said members a and b, the fast member 61having the peripheral groove g, the collar 19 between said parts I) andd, the wedge-shaped latch is with nose riding in said groove, and thebolt 6 sliding on the shaft on which said member (Z is keyed, and theinclined portion of said latch and engaging said catch.

In testimony whereof I have hereunto signed my name in the presence oftwo wit- IIGSSGS.

CLARENCE B. SCHULTZ.

Witnesses:

G. H. S. SCHULTZ, W. HAUPT.

